Answer
$x=0$
Work Step by Step
The axis of symmetry for $y=ax^2+bx+c$ is $x=-\frac{b}{2a}$.
Now if $b=0$ then the axis of symmetry becomes $x=0$.
Because $a$ is in the denominator, when $a=0$ you can't find the axis of symmetry.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 8 - Graphing Quadratic Functions - 8.3 - Graphing f(x) = ax^2 + bx + c - Exercises - Page 437: 30
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